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TundraGeneral discussion forum for the 2007 and later Toyota Tundra.
This is a discussion thread titled "Get better fuel mileage guaranteed", within the Tundra forum, part of the Truck Forums category.
Yeah, but what about the cold winter air intake? Doesn't that result in a more efficient engine?
Not at all. The cold air will result in more peak HP. But that air is less "willing" to mix with the fuel before combustion, and there is more energy loss involved in heating up the cool air during combustion.
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Not at all. The cold air will result in more peak HP. But that air is less "willing" to mix with the fuel before combustion, and there is more energy loss involved in heating up the cool air during combustion.
Oh no!!! so the CAI I put in is going to hurt my mileage!!!
I just can't win
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If we really want to get technical on the "thinner air" debate. Warmer air is less dense resulting in less Aerodynamic Drag.
More importantly though, less dense air means that there are less air molecules per given volume being sucked into your engine. Since your MAF and your ECU are constantly trying to match the proper amount of fuel molecules to air molecules for proper combustion if the incoming air is less dense you will use less fuel. Consequently, you will also lose a percentage of power. That is why SAE has exact standards for measuring HP Ratings that include temperature of the air in the intake. You can actually get a good explanantion of this by reading about aircraft piston engines. Also, for those who live in areas like Denver where your air is less dense than someone like me who lives near sea level you will generally see higher MPG's but less power. I can attest to this personally as a good friend of mine that lives in Denver had the same model of Tacoma as I did and no matter how conservatively I drove he always averaged 2-3mpg better than me.
Just figured I'd chime in my knowledge of both aerodynamics and engines.
This You Mite Try-----------I went to the $ store and tried there octain booster---I have made 3 checks of 4 tanks then 4 tanks with out it and and every time I put it in I got A 1m Increase in gas millage !
If we really want to get technical on the "thinner air" debate. Warmer air is less dense resulting in less Aerodynamic Drag.
More importantly though, less dense air means that there are less air molecules per given volume being sucked into your engine. Since your MAF and your ECU are constantly trying to match the proper amount of fuel molecules to air molecules for proper combustion if the incoming air is less dense you will use less fuel. Consequently, you will also lose a percentage of power. That is why SAE has exact standards for measuring HP Ratings that include temperature of the air in the intake. You can actually get a good explanantion of this by reading about aircraft piston engines. Also, for those who live in areas like Denver where your air is less dense than someone like me who lives near sea level you will generally see higher MPG's but less power. I can attest to this personally as a good friend of mine that lives in Denver had the same model of Tacoma as I did and no matter how conservatively I drove he always averaged 2-3mpg better than me.
Just figured I'd chime in my knowledge of both aerodynamics and engines.
woah woah woah...i think you got things mixed up...cold air is more dense (fog settles) and warm air is less dense (hot air rises) therefore someone closer to sea level such as the houston area your truck would get better mpg than someone in the denver area...when the air is cold your sensor knows and more fuel is put into your engine--so in denver wouldn't you be using more fuel??? jw
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I have no idea if the Fitch gives you better mileage but I do know that if you put one in a tank of a snowmobile being stored over summer the gas will not go bad.So I would say it works to stabilize the fuel at minimum.
This device has been tested by the EPA, and there was no measurable increase/decrease in MPG.
Who knows if the EPA is honest?
The EPA is more criminal than this company, afterall, you can fail on not using approved parts even if what's coming out your exhaust is within the reasonable specs for your car.
Are you trying to say that "air temperature has no effect on MPG"???
Because that would be wrong. Wind resistance is the biggest loss at hiway speeds, more so than weight. Now city driving weight is the biggest factor, and not so much wind resistance. There is 2x the air mass per volume at -40 C than at +40 C.
And cold air is more dense and in turn requires your injectors to give more fuel to prevent too lean of a mixture.
You guys are getting wayyy off topic. The thread is about the Fitch thing, not cold air intakes. Create a new thread, or just stop posting about it in this one. In two months, I don't want to see a poor soul searching for CAI's and bump this one on accident.
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woah woah woah...i think you got things mixed up...cold air is more dense (fog settles) and warm air is less dense (hot air rises) therefore someone closer to sea level such as the houston area your truck would get better mpg than someone in the denver area...when the air is cold your sensor knows and more fuel is put into your engine--so in denver wouldn't you be using more fuel??? jw
There are wo different aspects to think about when it comes to air density. Temperature and Ambient Pressure. Temperature you have the right idea about (Cold Air is Dense and Sinks, Hot Air is less dense and rises). I was trying to explain how someone at sea level will be bringing in more dense air because of their altitude/elevation compared to someone who lives in Denver at 5,000 plus feet in elevation. As you go up in altitude air density/pressure decreases meaning less molecules of Oxygen per given volume of air. Less oxygen means you need less gas other wise you would start burning too rich. Vice Versa if you go down in altitude your air density/pressure increases meaning you have more Oxygen molecules per given volume of air meaning that you need more fuel or you will go lean. Thus, places like Houston or where I live you will burn more gas generally, but also get more power. This is why piston-powered aircraft have mixture control knobs so you can avoid being too rich or too lean as you change altitiudes. Our trucks do this automatically by the MAF, computer and fuel injection system. Some older carbureted cars had mixture set screws that you could adjust if you took the car to higher altitudes.
About the Fitch Fuel Catalyst, I haven't looked at it yet but what is the idea behind how it works? It seems like quite a bit of work and $ for a savings that could be achieved by improving driving habits.
I saw an episode of Trucks! recently where they installed it on a cummins. They recited all the marketing stuff about what it should do, and said they'll update us on it's effectiveness on a future episode. Considering Fitch is a corporate sponsor of the show(s), I suppose it'll be favorable, or they just won't show the results at all.
While I'd like to see a product that really works, I'm not holding my breath.
Yeahy I seen that episode of truck's also I can't wait to see what the out come is.
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Re: Get better fuel mileage guaranteed
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